Holyoke, CO 80734

2 water systems • 2,672 residents

Moderate water quality - consider filtration

C

Score: 42/100

Graded on EPA violations, contaminants, severity, compliance, and enforcement history. See methodology.

Data updated June 2026 • Sources: EPA ECHO and EPA Envirofacts

31

Contaminants Detected

145

Violations on Record

35

Health-Based Violations

0

Recent Violations

Grade Breakdown

Contaminant Count0 / 25
Violation History16 / 25
Contaminant Severity3 / 25
System Compliance0 / 15
Enforcement History0 / 10
Total Score42%

42 / 100 points

Recommended Water Filters

  • ✓Reverse Osmosis or Ion Exchange Filter
  • ✓Ultraviolet (UV) Purification
  • ✓Activated Carbon Filter (disinfection byproducts)
Compare filter types in our Filter Guide →

Consult a water quality specialist for personalized recommendations.

Holyoke vs CO & National Average

Detected Contaminants

31 contaminants detected across water systems serving this ZIP code

ContaminantCategory
NitrateAgricultural
Total Haloacetic Acids (HAA5)Disinfection Byproduct
TTHMDisinfection Byproduct
ArsenicHeavy Metal
Coliform (TCR)Microorganism
E. COLIMicroorganism
1,1,1-TrichloroethaneOther
1,1,2-TrichloroethaneOther
1,2-DichloropropaneOther
ChlorineOther
DICHLOROMETHANEOther
DiquatOther
EndothallOther
Stage 1 Disinfectants and Disinfection Byproducts RuleOther
1,1-DichloroethyleneVolatile Organic
1,2-DichloroethaneVolatile Organic
1,2,4-TrichlorobenzeneVolatile Organic
BenzeneVolatile Organic
Carbon tetrachlorideVolatile Organic
CHLOROBENZENEVolatile Organic
cis-1,2-DichloroethyleneVolatile Organic
EthylbenzeneVolatile Organic
o-DichlorobenzeneVolatile Organic
p-DichlorobenzeneVolatile Organic
StyreneVolatile Organic
TetrachloroethyleneVolatile Organic
TolueneVolatile Organic
trans-1,2-DichloroethyleneVolatile Organic
TrichloroethyleneVolatile Organic
Vinyl chlorideVolatile Organic
Xylenes, TotalVolatile Organic

Water System Information

Systems Serving This ZIP:
SEABOARD FOODS LLC, HOLYOKE CITY OF
Population Served:
2,672
Systems With Violations:
2 of 2
Major Violations:
99
Enforcement Actions:
145

Nearby Areas

80746

Paoli • 10.6 mi away

F

80731

Haxtun • 13.2 mi away

F

80737

Julesburg • 20.4 mi away

B

80744

Ovid • 20.4 mi away

D

80749

Sedgwick • 21.8 mi away

F

80728

Fleming • 31.6 mi away

F

Frequently Asked Questions

What does the grade mean?

Our A–F grade ranks this ZIP code's water quality against every other analyzed ZIP in the country, based on EPA data. A = among the best, F = among the most troubled.

Is my tap water safe to drink?

Water systems regulated by the EPA must comply with Safe Drinking Water Act standards. However, if you're concerned about water quality, consider a water filter appropriate for your contaminants.

How often is the data updated?

We update our data quarterly with the latest EPA ECHO and Envirofacts data. Historical violations are tracked to identify patterns.

What filters do you recommend?

Filter recommendations are based on detected contaminants in your area. See our Filter Guide for detailed information about different filter types.